package rabbitmq.simple;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class ConsumerDemo {

    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        //1.建立链接
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("1.92.79.64");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("study");

        Connection connection = connectionFactory.newConnection();
        //2.创建Channel
        Channel channel = connection.createChannel();
        //3.声明队列（可以省略）
        channel.queueDeclare("hello",true,false,false,null);
        //4.消费消息
        DefaultConsumer consumer = new DefaultConsumer(channel){
            //从队列中收到消息，就会执行的方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接收到消息： " + new String(body));
            }
        };
        /**
         * String basicConsume(String queue, boolean autoAck, Consumer callback) throws IOException;
         * 参数说明：
         *  queue：队列名称
         *  autoAck：是否自动确认
         *  callback：接收到消息后，执行的逻辑
         */
        channel.basicConsume("hello",true,consumer);
        //等待程序完成
        Thread.sleep(5000);

        //5.释放资源
/*        channel.close();
        connection.close();*/

    }

}
